Santa Cruz is a wonderful location for us to decide weighty matters such as how best to ship a C++ Standard with the overloaded number of issues. Normally a surfing town as I am told, I have not had a chance to even make it to the ocean shoreline as yet even...

In the previous entry , I covered how to use the -Xdump option to generate additional information when an exception is thrown. In this entry I promised to show how to use a system dump to get more information about a java.net.ConnectException. Below is a...

One of the most common requests we receive in Java L3 service is to include more data in javacore files.
Javacore files are human-readable text files which summarise the state of the JVM. By default, we write one to disk when you send SIGQUIT to the Java...

I talked with a WebSphere Application Server support analyst the other day and they mentioned they had seen some "easy problems" coming in to Level 2 support recently. I thought it would be good to blog about these easy ones so you can solve on your...

Before we look further in to memory affinity we need to recap on the scheduling of processes and process threads of a multi-threaded process to simultaneous multi-threading (SMT) processors like POWER7. POWER5 and POWER6 had two modes of SMT off (one thread)...

This is a follow on from yesterdays blog due to Chris Gibson highlighting a question/concern from one of his customers in Australia.They were comparing Power6 and Power7 and the utilisation numbers from the SMT Logical Processors and the graphs look different....

In one of my previous posts I wrote about "Why inter-node traffic across ISLs should be avoided" . There is an additional "bad practice" that could lead to performance problems in the host-to-SVC traffic. Let's imagine a core-edge fabric. A...

We are pleased to announce that new versions of TEM for Core Protection and its Data Protection Add-on (Core Protection Module v10.6 SP1) are now available. The highlights of this new release include: * Data Protection 64-bit support * Behavior Monitoring...

Occasionally an ITM component fails and terminates itself as it can no longer continue. Understanding what we need to diagnose the failure and sending that documentation when a PMR is opened has the potential to reduce the problem resolution time by hours or...

A slow drain device often has a huge impact on the performance of many other devices in a SAN environment. That happens, because they block resources in a fabric other devices use as well. The main example for such a resource are ISLs, particularly the Virtual...

We don't know whether the information we find on the Web is accurate or not . The Dublin Core model describes a resource for the purpose of discovery. The W3C PROV model describes entities and processes involved in producing and delivering that resource. ...

Time to correct a few assumptions and statements that I made a while back. Previously I said the POWER Hypervisor decides where to put a Virtual Machine (VM/LPAR) based on the Virtual Processor number (spreading factor). Well, apart from it nearly being...

This is embarrassing! While we always encourage users to upgrade to the latest AIX TL and SP levels, AIX 6.1 TL 8 will cause the aixDataProvider-61 process to core on the AIX Premium and VIOS Premium agents. AIX 6.1 TL 8 is the underlying AIX for VIOS 2.2.2,...